It’s no secret that Amazon is interested in developing supermarkets that do away with people and replace them with sensors, scanners, and chips. They’re called Amazon Go stores.

Amazon Go stores feature technology that allows shoppers to simply walk in, grab what they want, and leave. Amazon opened its first Amazon Go test store in Seattle earlier this year. The cashierless store uses a range of sensors and a smartphone app to know what customers have purchased.

Bloomberg’s source reportedly said that Amazon is looking at introducing the same technology in its Amazon Go stores to Whole Foods stores.

Amazon did not immediately respond to Business Insider’s request for comment.